2t)0 THE AMERICAN MONTIH.Y [Oct., 



Vorticella microMama, Ehr. Infreijuent. 



V. communis. From (?) Scarce. 



Li(ouotus JascioUi, (Ehr.) Wrzes. Infrequent. 



Chilodon cucidlulus, (Mull.) Ehr. Infrequent. 



ROTIFKRE.t:. 



Polyarthra platyptera, Ehr. Scarce. 

 Monostyin lunaris, Khr. Scarce. 

 Brachionus urccolaris, Ehr. Infrequent. 

 Anurea cochlenris, Gosse. Not infrequent. 

 Seven other forms were .>^een but their diagncsis is as yet un- 

 certain ami hence omitted. 



CRUSTACEiK. 



Cyclo})ii quadrirornia, (L.) Muller. Not common. 



Dnphnia pidex, ( L. )Muller. (?) Only fra^'mcnts thus far found. 



Bosmina longirnstris, Baird. Thus far only fragmeaU* of this. 



VERMKS. 



Anguillula fluviatilis, L. Occasional. 



The GWA Mixture. — This is an abbreviation for <rlycHrlne 

 (1 part,) water (2 parts,) alcohol (3 parts,) and is sometimes 

 called the 1-2-3 mixture. It is used for soaking vegetable sec- 

 tions before mounting them in Farrant's medium. 



Triassic Diatomaceae. — Dr. A. M. Edwards reports (Am. 

 Xnt.. Sf/'t. I'^-t-i ', finding diatoms in a clay i)it near Passaic, 

 N. J., which he considers to be the first ever found in that geo- 

 logical formation. This Triassic clay contained Gomphonema 

 acuminatum and Brebissonia lanceolata assofiated with sponge 

 spicules. 



Deane's Medium. — Soak one oz. gelatine in 4 oz. of water 

 until the gelatine becomes soft, add 5 oz. of honey heated to a 

 boiling point, boil the mixture, then cool (but not stiff) add ^' 

 oz. of rectified spirit and 5 droj)s of creosote. Filter through 

 fine flannel. 



Bubbles in Media. — Place the bottle in a pan of hot water 

 until the bubbles rise and disappear. 



